Martha added: "I have so much stuff I'm getting rid of, we have to downsize, so my wardrobe is going to be one fraction what it is now."
The reality star then told her followers that she will be selling her designer clothes at Hunter Markets, in Melbourne on Sunday.
While Michael encouraged followers to "buy it all" to free up some wardrobe space for him after the move.
"Michael is going to be folding all your clothes neatly and putting it in tissue paper and closing it off with a little sticker," she told her followers.
The couple's declaration is in stark contrast to last week, when rumours were rife that the pair had split after they hadn't been seen together since the ARIAs in November.
Fans were concerned for the couple and began asking questions after Martha shared a shared a video of herself in a bikini last Thursday.
"Where's Michael?" asked one person, but Martha did not respond.
Another concerned fan wrote: "I hope you and Michael are still together, you have so much fun."
However it was back to regular programming for the couple this week, and they have posted numerous photos and video together.